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Int J Biol Macromol. 2019 Jun 1;130:903-914. doi: 10.1016/j.ijbiomac.2019.03.038. Epub 2019 Mar 5.

Comparison of different extraction methods for polysaccharides from bamboo shoots (Chimonobambusa quadrangularis) processing by-products.

Author information

1
College of Food Science, Southwest University, 2 Tiansheng Road, Beibei, Chongqing 400715, PR China. Electronic address: gjchen1989@126.com.
2
College of Food Science, Southwest University, 2 Tiansheng Road, Beibei, Chongqing 400715, PR China.
3
Department of Medical Technology, Chongqing Three Gorges Medical College, 366 Tianxing Road, Wanzhou, Chongqing 404120, PR China.
4
College of Food Science, Southwest University, 2 Tiansheng Road, Beibei, Chongqing 400715, PR China; Laboratory of Quality & Safety Risk Assessment for Agro-products on Storage and Preservation (Chongqing), Ministry of Agriculture and Rural Affairs of the People's Republic of China, Chongqing 400715, PR China; Chinese-Hungarian Cooperative Research Centre for Food Science, Chongqing 400715, PR China. Electronic address: kanjianquan@163.com.

Abstract

The aim of this study was to evaluate the influences of extraction methods on the yield, chemical structure and antioxidant activity of polysaccharides from bamboo shoots (Chimonobambusa quadrangularis) processing by-products (CPS). CPSs were extracted by using five methods including hot water extraction (HWE), accelerated solvent extraction (ASE), ultrasonic-assisted extraction (UAE), microwave-assisted extraction (MAE) and enzyme-assisted extraction (EAE). The experimental results showed that the uronic acid contents, monosaccharide contents, molecular weights and antioxidant activities of the five CPSs were significantly different. CPS extracted using ASE method (ASE-CPS) possessed the highest extraction yield (9.94%), the highest medium-high-molecular-weight value (136.07 kDa) and notable antioxidant ability. UAE-CPS had the highest uronic acid (9.42%) and the lowest medium-high-molecular weight value (117.49 kDa), and its antioxidant activity was the best. Based on the correlation analysis, the higher uronic acid content, smaller molecular weight, and lower content of monosaccharide composition of glucose for the CPS-UAE might contribute to its higher antioxidant activity. From an industrial viewpoint, ASE technique could be a promising and alternative way to extract CPS due to its high yield, notable antioxidant activity, and convenient industrialization.

KEYWORDS:

Antioxidant activity; Chemical structure; Chimonobambusa quadrangularis polysaccharides; Extraction methods; Physicochemical property

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